package nc.gk.gkxm.filter;

import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import nc.gk.gkxm.model.other.JwtProperties;
import nc.gk.gkxm.utils.jwt.JwtUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Jwt令牌校验拦截器
 */
@Component
@Slf4j
public class JwtTokenInterceptor implements HandlerInterceptor {
    @Autowired
    private JwtProperties jwtProperties;
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception{
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)){
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());
        //2、校验令牌
 //       try {
            if(token == null){
                throw new Exception("没有登录");
            }
            log.info("jwt登录校验{}",token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get("userId").toString());
            log.info("当前用户id:{}",userId);
            BaseContext.setCurrentId(userId);
            //3、放行
            return true;

//        }catch (Exception ex){
//            //4、不通过，响应401状态码
//            response.setStatus(401);
//            return false;
//        }
    }
}